نتایج جستجو برای: loading surface model

تعداد نتایج: 2685651  

2010
Mark Mahan Yannis F. Dafalias YeongAe Heo Sashi K. Kunnath

A simple constitutive model for the inelastic response of steel under monotonic and random cyclic loading conditions is developed within the framework of bounding surface plasticity. The particular feature that distinguishes this model from other similar ones is the ability of the bounding surface formulation to describe in a very simple way the initial “plateau” type of perfectly plastic respo...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this thesis protic and aprotic ammonium-based ionic liquids were synthesized and their surface tensions were measured in the range of 298-373k. the protics are alkyl ammonium-based ils with the carboxylate (formate, acetate, propionate) anion and aprotics are quaternary ammonium-based ils with bis(trifluoromethylsulfonyl)imide anion. capillary rise method was used for surface tension measure...

Journal: :avicenna journal of dental research 0
hassan semyari department of periodontology, dental school, shahed university, tehran, ir iranسازمان اصلی تایید شده: دانشگاه شاهد (shahed university) seyed shojaoddin shayegh department of prosthodontology, dental school, shahed university, tehran, ir iranسازمان اصلی تایید شده: دانشگاه شاهد (shahed university) toktam jalayer department of radiology, dental school, shahed university, tehran, ir iranسازمان اصلی تایید شده: دانشگاه شاهد (shahed university) mohammad bagher alkhafaf dental school, shahed university, tehran, ir iranسازمان اصلی تایید شده: دانشگاه شاهد (shahed university) farshid bastami dental school, shahed university, tehran, ir iran; dental school, shahed university, italy st, vesal ave, keshavarz blv, tehran, ir iran. tel: +98-2188959210, fax: +98-2188954915سازمان اصلی تایید شده: دانشگاه شاهد (shahed university)

conclusions consequently, this study shows promising results for il of single implants, and it can be considerable that treatment with microtextured surface implants is a predictable and appropriate method of treatment. background the immediate loading (il) protocol has gained increased popularity among surgeons in the last decade. objectives this study aimed to evaluate the clinical performanc...

Journal: :مهندسی مکانیک و ارتعاشات 0
کاظم رضاکاشی زاده دانشجوی دکتری، باشگاه پژوهشگران جوان، واحد سمنان، دانشگاه آزاد اسلامی ، سمنان، ایران محمد جعفر استاد احمد قرابی استادیار، گروه مهندسی مکانیک، واحد سمنان، دانشگاه آزاد اسلامی ، سمنان، ایران علیرضا ارغوان عضو هیئت علمی، گروه مهندسی مکانیک، واحد سمنان، دانشگاه آزاد اسلامی ، سمنان، ایران

this paper presents the fatigue life behavior of hub using random vibration based on road roughness. the main objectives of this study are to predict the fatigue life and to identify the critical location for evaluating fatigue damage. asphalt road surface profiles obtained in favorable circumstances by topography cameras and in according road classification iso 2631-1estimate road roughness su...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - پژوهشکده مهندسی فرایند 1395

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...

2015

The discovery of denitrifying anaerobic methane oxidation (DAMO) enables the complete N removal from wastewater by utilizing the methane produced onsite from anaerobic digesters. This model-based study evaluates complete nitrogen removal by coupling nitritation-Anammox and DAMO in membrane biofilm reactors (MBfRs). The influences of nitritation produced NO2/NH4 ratio, methane supply and total n...

2005
Ralf Brüggemann Wolfgang Härdle Julius Mungo Carsten Trenkler

The implied volatility of a European option as a function of strike price and time to maturity forms a volatility surface. Traders price according to the dynamics of this high dimensional surface. Recent developments that employ semiparametric models approximate the implied volatility surface (IVS) in a finite dimensional function space allowing for a low dimensional factor representation of th...

2008
Volatility Strings Ralf Brüggemann Wolfgang Härdle Julius Mungo Carsten Trenkler

The implied volatility of an option as a function of strike price and time to maturity forms a volatility surface. Traders price according to the dynamics of this high dimensional surface. Recent developments that employ semiparametric models approximate the implied volatility surface (IVS) in a finite dimensional function space, allowing for a low dimensional factor representation of these dyn...

Purely elastic, partially and fully plastic stress states in a thick-walled spherical pressure vessel with an inner functionally graded material (FG) coating subjected to internal and external pressures are developed analytically in this paper. The modulus of elasticity and the uniaxial yield limit of the FG coating layer are considered to vary nonlinearly through the thickness. Using Tresca’s ...

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